I found a way to fit 2-inch CAT-8 aircraft grade flex piping, by tapping a hole in the OE brake duct, and routing under the belly pan/splashshield.
See pics below:
This is where I have tapped a hole in the OE duct that goes into the wheel fender...
These are central vacumm 2-inch elbows that I used my dremel on, to create a mouth, and "Steal" the air from the OE bumper duct...
... elbow fed through cut-out on passenger side OE duct ...
... I used a flexible rubber funnel, that I carefully and gradually cut to fit inside the driver-side OE duct, and funnel air into my 2-inch 90* elbow...
This is how I route my 2-inch flex piping, above the plastic splash shield/belly pan, on the passenger side...
I havent yet decided whether to attach a 2-inch flange to the brake dust shield, or just cut an opening in the dust shield, and point the mouth of a 2-inch 45* elbow towards the center of the rotor.
